Accession Number : AD0434386


Title :   RESISTANCE MINIMUM IN EVANOHM WIRE,


Corporate Author : OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS


Personal Author(s) : Daunt,J G


Report Date : Mar 1964


Pagination or Media Count : 5


Abstract : In the course of measurements on the magnetoresistance effect in various commercial wires at low temperatures the electrical resistivity of Evanohm wire (75% Ni, 20% Cr, 2.5% Al, 2.5% Cu, supplied by Wilbur-Driver Company) in zero magnetic field was measured at temperatures down to 0.3 K. The data below 4.2 K are shown. It is evident that Evanohm passes through a resistance minimum. The temperature of the minimum can be estimated from previous data to be approximately 15 K to 20 K. The observed temperature coefficient of resistance at about 0.5 K is -0.003 K to the minum 1. Such resistance minima have been observed previously in other materials, particularly dilute alloys with transition elements and the example provided by Evanohm wire may be of further interest. In addition, the existence of the marked negative temperature coefficient of resistance below 1 K in Evanohm may be of value for thermometry. (Author)


Descriptors :   *ELECTRICAL RESISTANCE , MAGNETIC FIELDS , WIRE , TEMPERATURE , MEASUREMENT , NICKEL , COPPER , ALUMINUM , CHROMIUM , TRANSITION METALS , ALLOYS


Distribution Statement : APPROVED FOR PUBLIC RELEASE